Character Name : Captain Underpants / Mr. Krupp (voice)

Original Name : Nat Faxon

Gender : Male

Character Name : Harold (voice)

Original Name : Jay Gragnani

Gender : Male

Character Name : George (voice)

Original Name : Ramone Hamilton

Gender : Male

Character Name : Narrator / Mr Gigglenose (voice)

Original Name : Sean Astin

Gender : Male

Character Name : Jessica / Dressy (voice)

Original Name : Dayci Brookshire

Gender : Male

Character Name : Mr. Ree (voice)

Original Name : Clancy Brown

Gender : Male

Character Name : Melvin / Stanley Peet / Melvin's Dad (voice)

Original Name : Jorge Diaz

Gender : Male

Character Name : Comic Narrator (voice)

Original Name : Peter Hastings

Gender : Male

Character Name : Steve "Gooch" Yamaguchi (voice)

Original Name : Evan Kishiyama

Gender : Male

Character Name : Mr. Meaner (voice)

Original Name : David Koechner

Gender : Male

Character Name : Erica / George's Mom (voice)

Original Name : Erica Luttrell

Gender : Female

Character Name : Miss Anthrope / Harold's Mom (voice)

Original Name : Patty Mattson

Gender : Male

Character Name : Bo Hweemuth (voice)

Original Name : Brennan Murray

Gender : Male

Character Name : Diddlysaurus / George's Dad (voice)

Original Name : Kevin Michael Richardson

Gender : Male

Character Name : Melvin's Mom (voice)

Original Name : Mindy Sterling

Gender : Female

Character Name : Creepy Rattlechains (voice)

Original Name : Stephen Tobolowsky

Gender : Male

Character Name : Mayor Hoppy McChapper (voice)

Original Name : Kari Wahlgren

Gender : Female